Iozone: Performance Test of File I/O Version $Revision: 3.483 $ Compiled for 64 bit mode. Build: linux-AMD64 Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rhine, Mike Wisner, Ken Goss Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa, Alexey Skidanov, Sudhir Kumar. Run began: Sat May 9 15:33:57 2026 Auto Mode Machine = Linux oleg154-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg154-client.virtnet/iozone-file Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 64 4 10017 19754 1119387 727850 64 8 14708 30549 866463 598110 64 16 18249 63492 1183548 983980 64 32 18812 99243 1163036 1599680 64 64 25983 96116 1033216 1768283 128 4 13913 21869 695603 826202 128 8 23668 40740 1057236 1406136 128 16 18658 48652 948860 1349580 128 32 29816 112297 1319723 1076312 128 64 33288 146613 1406136 2326073 128 128 18102 174433 1102844 3560017 256 4 12397 23332 740100 602276 256 8 26047 45928 1169901 757326 256 16 29659 52393 1455317 1321031 256 32 40062 77949 1327564 1132871 256 64 46697 113927 2015259 1817419 256 128 43075 209151 2061693 2210228 256 256 49923 214242 2413957 2413957 512 4 18408 23721 1218910 1004057 512 8 28332 36358 1350783 915847 512 16 49325 82078 1375881 1049187 512 32 56713 117350 1375881 1169140 512 64 75875 144099 1635797 1467055 512 128 78421 201493 1718254 1312798 512 256 93855 181041 2022482 1674052 512 512 55357 193872 1729323 2187279 1024 4 17978 23422 1036228 864908 1024 8 28856 35585 1395010 991266 1024 16 49660 66403 1458489 983774 1024 32 57941 86479 1395010 952361 1024 64 86595 105382 1768345 1706515 1024 128 93294 157130 1495042 1241389 1024 256 78993 192445 1572783 1646334 1024 512 109390 172102 1448650 2047361 2048 4 18157 21123 689079 841753 2048 8 28263 36464 938195 1301149 2048 16 52613 65206 1572727 900619 2048 32 62980 103595 1399968 1278491 2048 64 86512 134560 1703741 1606254 2048 128 105632 173352 1770096 1689998 2048 256 106466 185777 2230685 1790015 2048 512 122804 161641 1741742 1459680 4096 4 19278 22401 1084190 1091075 4096 8 32261 43043 954553 1044381 4096 16 52174 66413 1338120 1627836 4096 32 74333 94519 1876390 1703033 4096 64 99890 138308 1883178 1389416 4096 128 114836 146285 1916795 1498095 4096 256 132801 198671 2106975 1773166 4096 512 123556 211570 2484145 2044053 8192 4 20482 20998 1172975 821908 8192 8 32158 38859 1734919 859062 8192 16 54111 59886 1322606 1109101 8192 32 67824 99497 2002455 1772783 8192 64 98745 105591 1704199 1411436 8192 128 111385 161339 2095641 1395840 8192 256 117377 176312 2368198 1762416 8192 512 119296 195849 1951392 2152892 16384 4 20166 22956 1002636 806057 16384 8 35024 36148 1311245 1140708 16384 16 52458 64524 1899387 1674255 16384 32 78017 97618 1974935 1445058 16384 64 94167 127376 2169531 1821454 16384 128 121998 156998 2168572 1632027 16384 256 108873 161705 2017493 1842947 16384 512 129456 171801 1831259 1727366 32768 4 19118 20732 806993 737619 32768 8 34244 38189 1109194 1127215 32768 16 54287 62760 1760484 1595255 32768 32 73331 92228 1938714 1639147 32768 64 98918 130477 1771147 1580779 32768 128 115050 164488 1891254 1951985 32768 256 129325 196746 2206160 2015003 32768 512 144252 193622 2564982 1881467 65536 4 19728 21714 817758 697007 65536 8 32396 36947 1095677 963169 65536 16 51097 61964 1551406 1251642 65536 32 74358 91340